I think the frets appeared to be seated on the board OK. It's the binding that's been set slightly lower than the height of the board that's causing the gap at the end. If so, you couldn't even tap the frets down a bit to seat them better as they won't go down further.
If you really had to, you could mix up some binding material with acetone, fill in the gaps under the fret ends and scrape the board down on the edges, but it's a lot of work with no guarantee of how successful you'd be, especially if it was your first go at that sort of thing. And not the sort of thing you'd want to do on a first build.
Alternatively you take the frets off, re-profile the board so that it meets the binding and then fit new frets, but that's even more advanced!
Last edited by Simon Barden; 30-10-2021 at 06:35 PM.